Hi there,

I'm not sure exactly what's happening lately, but we're seeing the
following errors more frequently:

[Email_SMTP] Server Error: 571 email@address prohibited. We do not relay
[Email_SMTP] Server Error: 473 email@address relaying prohibited. You
should authenticate first

We're using LP 8.5.5 and our Mail settings are as follows:

Ignore [Email_Send] -Host Param: YES
Send Directly to SMTP Servers: NO

Could an improperly set SPF record be causing this? Or is this related to Lasso?

Thanks for any help,

Israel Thompson

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